Coupling device adapted to be used for engraving machines



Jan. 20, 1931. E. w. HEWARD 1 ,3

COUPLING DEVICE ADAPTED TO BE USED FOR ENGRAVING MACHINES File d Jan. 24, 1927 2 Sheets-Sheet 1 Earaldt'nafiemard Jan. 20, 1931. w HEwARD 1,789,366

COUPLING DEVICE ADAPTED TO BE USED FOR ENGRAVING MACHINES Filed Jan. 24. 1927 2 Shets-Sheet 2 Patented Jan. 20, 1931 through the mechanism for EMMA UEL 'waa enaa' jinn/Ann,

DECErASE BYbERAIliSIiiEHEWAib; awesome, GANKJJA COUPLING DEVICE ADAPTED TO BE n'snn ron nnenavnvemacnmns Application filed January 2431927.:iseitialfmb. 163384;

This invention relatesto improvements in coupling devices for engraving machines, and the object of the invention isto devise in an engraving machine using-a manually operated lever and foot lever, a coupling for interchangeably connecting the manually operated lever and foot lever with the partsv operated therehy and it consists essentially of the arrangement and construction of parts as hereinafter more particularly explainedr Fig. l is a perspective view of the machine. 2 1s a transverse sectional View Fig. 2

head block.

Fig. 3 is a vertical sectional view on line 33 Fig. 2.

Fig; 4. is a perspective detail of the slide lever interposed between the foot pedal rod and rod leading to the head block adjusting mechanism.

Fig. 5 is a sectional detail through Figure 4. I

F igs. 6 and 7 are plan views of the head block and main casting on which the head block is slidably supported separated apart.

Fig. 8 is a sectional view on line 88, Fig ure 7.

Fig. 9 is a sectional detail showing the parts 15, 35 and 36 in the disengaged position, and r Fig. 10 is a similar View the parts 15, 35 and 36 in tion. 7

In the drawings like characters of refer ence indicate corresponding parts in each fi ure.

1 indicates the main table of the machine supported upon'legs 2 and 3.

8 is a bed plate base mounted and suitably secured upon the table 1. 9 is a main standard extending upward from the rear portion of the base 8 and extending forwardly to form a head block support 10 at each side of which are formed the guide ribs 10? and 10 to Fig. 9 showing the engaged posiat each side of a central vertical groove 10 11 is a shaft journa-lled in orifices 12 and 13 formed in the side walls of the recess 14, the outer portion of which is threaded as indicated at 11? (see Figure .2). 1 1 is a bearing plate secured tothe portion 10 of the main adjusting the i oasting ,Q'j-and provided with an. orifice 14* through which theshaft ll freely extends. 51$ Mue le -plat -supp r d r e y uponithershaft 11. 16;.isaplate-seeuredtothe plate andslocked I shaftgll and having bearing contact -withthe plate 14. The.-plate;--15 is ;p.roriided .with..a peripheral' lug 15*.to which a :linkrodl? is pivotally; secured.

18 is "a link-lever, which is provided with anamdercutrgroove ,8 inwhich the inner -member19 :slid'ably The opposite end oft-he ii'nlrrod" f7 1S=pil'Y- :otallyfconnected to the member-:lQas clearly indicated 20in Figuret l. 5 p

The outer member 18 is providedxwithga stuld 21 turnabl-y mounted in the main standare 7 V y 22 is a ing extending from the member ,18 tc -Which the pedal; link rod 23 is pivotally connected. 24: is a foot'pedal mountedalpon a bracket 25 and-,pivotal ly connected at- .26 to thelowerend of=the link rod 23.-

is a stop lug eitendingfrom the lower peripheral .portion-of the circular. -plate15.. 28 is alug internallyathreaded orifice provided with a locking lever 31 threaded v"thereon 'and bearing against thegend of the lugi28gso as tolock thescrew 2 9 from longi 'tudinal movement. 32 is a plateprovided with a circular recess 33 in its frontiace.

\The plate 82 is freely fitted with a central TORONTO, emam taaana.

by .a setscrew n) the the outer member 'of 7 extending from the .main standard 9 "and,

29 is a stop screwextending through orifice in which is' driiven an internally-thread ed sleeve or bushing screwed upon thesha ft 1-1 asclearl-y in dicated gin Figure 2. The plate 32 isralso provided withorifices-B extending are slightly longer than the length of the .orifi'c'es so that their projecting ends. engage the-opposing faces of the plates' lo and-36 and thereby -increase, frictional contact. 36 is a plate. whichfits freelya-wit lrin the therethrough and containing pins .35 which ice recess 33 and upon the shaft 11. 37 is a nut threaded upon the outer end of the shaft 11 and provided with a handle38. 39 is a handle extending from the plate 32. 10 is a head block provided with a slideway 11 slidable upon the guide ribs 10 and 10" rack formed in the base of the slidewa-y 41 and adapted to mesh with the gear segment 43 secured upon the shaft 11 within the recess 14. 14' is a locking screw whereby thehead. block may be manually locked in any desired position. 7

When lever the manually operated lever 39 does not work back and forth, the action from the foot lever passes through the linlr rod 17 to the lug 15* upon the disc 15 which is reciprocated concentric to the shaft 18 free of the disc 32 and, therefore, turns the member 16 so as to tudinally into engagement with the secured disc and to project slightly at their opposite ends into the aforesaid recess, a disc fitting within the recess and turnable freely around the shaft, and a clamping device for forcing the disc of the recess against the pins and the pins against the secured disc atthe opposite end of the pins. i

j GERALDINE HEWVARD, Ewecut'rdmfof Emmanuel Waggoner H award,

Deceased.

the device is operated by the foot rotate the shaft 11 and operate the head block. i

When the plate 32'is locked to the disc 15 by means of the pins 35 forced into frictional engagement between the discs 36 and 15. by means of the nut 37 when screwed against the disc 36 and the manually operated lever 39 employed, the shaft 11 is turned through the discs 32 and 15 and plate 16, the foot lever operating freely up and down. Nhen the shaft 11 is turned either by the hand operating handle 39 or by operating the foot-pedal 24; the head block is raised or lowered as desired. Y

The bed plate ported is then adjusted in the usual manner by turning the lead screws and 46 to carry the members of the slide rest in a longitudinal or transverse direction according to comupon which the work is supmon practice. After this adjustment is accomplished the foot pedal 24 drops carrying 3 the cutting tool again into engagement with thefworlr, such downward movement being limited by the lug 27 of'the plate 15 engaging the end of the stop screw 29;

If it is desired to adjust the head block manually the lever 38 is operated to turn the nut 37 so as to carry it against the plate 36 and thusmake the connection between the plates 36, 32 and 15. When this is done the adjustment is made manual byfthe operator grasping the handle 39 and directly turning the plate 32 connected to the plate 15'by the clutch pins 35 thereby turning the shaft 11 and operating the quadrant43 and rack 12 as above described. p 7

64 is the head spindle journalled in bearingsj65and 66 and suitably driven.

' NVhat is claimed as theinvention is:

In a device of the class described, the combination with a threaded shaft, of a disc se-,

cured thereto, a disc having a recessed outer face and bearing at its opposite face against the secu red disc and having orifices extending therethrouglnmeans forfreely mounting the recessed disc upon the threaded; shaft,

pins freely heldin the orifices to be slid longi- 

